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Shuji Nakamura (中村 修二, Nakamura Shūji, born May 22, 1954) is a Japanese-American electronic engineer and inventor of the blue LED, a major breakthrough in lighting technology. [3] Nakamura specializes in the field of semiconductor technology, and he is a professor of materials science at the College of Engineering of the University of ...
"The Original Blue LED", Science History Institute By selection of different semiconductor materials , single-color LEDs can be made that emit light in a narrow band of wavelengths from near-infrared through the visible spectrum and into the ultraviolet range.
Isamu Akasaki (赤﨑 勇, Akasaki Isamu, January 30, 1929 – April 1, 2021) was a Japanese engineer and physicist, specializing in the field of semiconductor technology and Nobel Prize laureate, best known for inventing the bright gallium nitride p-n junction blue LED in 1989 and subsequently the high-brightness GaN blue LED as well.
In 1992, Japanese inventor Shuji Nakamura, while working at Nichia Chemicals, invented the first blue semiconductor LED using an InGaN active region, GaN optical guide and AlGaN cladding, and four years later, the first low-power blue laser; eventually receiving the Millennium Technology Prize awarded in 2006, and a Nobel Prize for Physics ...
Such high-quality GaN led to the discovery of p-type GaN, [17] p–n junction blue/UV-LEDs [17] and room-temperature stimulated emission [25] (essential for laser action). [26] This has led to the commercialization of high-performance blue LEDs and long-lifetime violet laser diodes, and to the development of nitride-based devices such as UV ...
A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...
Blue LED Cherenkov radiation , the physical phenomenon responsible for the characteristic blue glow in nuclear reactors Blue light (pyrotechnic signal) , a firework composition used for night-time signaling and illumination
The blue-LED-based V-Mouse VM-101. Optical mice often used light-emitting diodes (LEDs) for illumination when first popularized. The color of the optical mouse's LEDs can vary, but red is most common, as red diodes are inexpensive and silicon photodetectors are very sensitive to red light. IR LEDs are also widely used. [16]